Water purifying apparatus



April A. B. CONANT I WATER PURIFYING APPARATUS Filed 001:. 25, 1957 2'42 062 53"- fi/az? 5. Conan? fat M4 Patented Apr. '2, 1940 PATENT orricr.v

wncrnn r RIFYING APPARATUS Alan B. Conant, .San Francisco, Calif assig-nor .to Montgomery Brothers, San, Francisco, Calif., a copartnershipcomposed of F. Montgomery and W. R. Montgomery Application October 25, 1937,.Seria1 No. 170,801

' v 2 Claims (01. 210-27 The invention relates to apparatus for ozonizing water.

The object of the invention is to provide an improved apparatus in which a mixture or emulsion of water and ozone willbecaused to travel tangentially aroundand upwardly in an annular chamber, to efieot a thorough mixing of the ozone and water, and by which the'excess or spent ozone will be released, and the treated water will be stored for use. i

Another object of the invention is'to provide an improved apparatus of thise-haracter-in which the mixing of the ozone and water is'efiected in an annular chamber and overflows into a storage reservoir inside of the chamber for maintaining a constantly available supply of treated water for use, so that a single tank will serve both as a mixing and a storage reservoir for the treated water. j

Other objects of the invention will appear from the detail description. Y

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the conclusion hereof.

In the drawing: Fig. 1 is a side elevation'of apparatus embodying the invention. Fig. 2 is a vertical section of the combined mixing column and storage reservoir. Fig. 3 is a section on line 3-3 of Fig. 2. Fig. 4 is a section of the injector.

The invention is exemplified in apparatus comprising an ozone generator A; a dehydrator B for drying the air supplied to the ozone generator; a pipe b for delivering air from the dehydrator to the generator; an injector C connected to receive ozone from the generator A through pipe a pump D for delivering water under pressure through pipe d to the injector C; and a combined mixing column and'storage reservoir which receives mixed water and ozone from the injector C.

The combined mixing column and injector comprises a tank provided with an annular cylindrical wall ID, a bottom II and a top 12 secured together to form a substantially closed tank, and a cylindrical wall l3 united at its lower end to the bottom ll of the tank and terminating a short distance below the top 12. Wall I 3 is spaced from wall Hi to form an annular chamber, comparatively narrow in cross-section between Walls l3 and 14. Wall l3 also forms, within itself, a reservoir l5 of sufficient capacity to maintain a predetermined column of ozonized water which is sufficient to supply the demanded use. A pipe [6 is connected to the outlet of the injector to conduct the mixture of ozone and water or emulsion to the bottom of the annular chamber 14 and deliver it through a branch pipe I? tangentially into the lower portion of the mixing chamber. The annular wall 13 terminates below the top [2' of the tank to leave a space over its upper edge so that the mixture overflows from the top of the column in the annular chamber intothe storage reservoir l5. The pump Ddelivers water at sufficient pressure, for example at least thirty pounds, to force the water through the pipe 0! upwardly and across the top of the tank into the top of the injector C. The pressure and'fiow of water injects ozone produced in the generator A in a proper ratio of ozone and water. The mixture or emulsion of water and ozone passes-downwardly through pipe i6 and branch H and is delivered into the annular chamber Hi under sufficient pressure to set up a spiral action or flow which places in motion all of the column in the annular chamber I l with sufilcient back pressure to-reduce the flow but with sufiicient force to retain somewhat the spiral stream through the column. During this spiral flow through chamber Hi the water and ozone are thoroughly mixed and when the mixture reaches the top of wall IE it overflows the wall or cascades across the top of the inner column into the storage reservoir [5. This releases the excess or spent ozone into the upper portion of the tank for escape to atmosphere through a pipe 18 connected to the top I2 of the tank. This flow of water in the annular chamber 14 efiects an intimate mixture of the ozone and water and itsw delivery over the top of wall I I3 separates the excess or spent ozone irom the water flowing into and. in the storage reservoir l5. A pressure indicator 2! is connected to pipe (1 so the pressure of the water to the mixing column can be observed.

A predetermined column of treated Water is maintained in the reservoir l5 so that a supply will always be available for use, by means of an electric switch E which is connected to be operated by the height and pressure of the water in reservoir l5. This switch is suitably connected, as Well understood in the art, to automatically control the operation of an electromagnetically controlled water valve F which controls the delivery of water by pump D to the injector C and by conductors in a conduit iii to control the actuation of the generator A and the dehydrator. A water-seal c is connected to the ozone delivery pipe 0. An overflow pipe 2c is provided for the treated water in reservoir I5 to prevent any excess of treated water from accumulating in the reservoir in the event that the automatic control means for the water supply should fail to operate. The top I2 of the tank is provided with a manhole and cover 2| for access to the interior of the tank. The upper end of wall I3 is held in spaced relation from wall I0 of the tank by lugs 22 fixed to and depending from the top 12. Drain-plugs 24 and 25 are provided in the bottom II for the water in the chamber l4 and reservoir !5, respectively.

The invention exemplifies apparatus for ozonizing water in which the Water and ozone are delivered tangentially into the lower end of an annular chamber through which the mixture flows spirally so that the ozone and water will be thoroughly mixed for a sufdcient period for that purpose. The invention also exemplifies an apparatus of that character in which the mixing is effected in an annular chamber within which is formed a reservoir whereby an ample supply of treated water will be maintained to supply the demand.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

1. In apparatus for treating water with ozone, the combination of a tank comprising a cylindrical outer side-wall, a bottom and a top, an injector outside of the tank, means for supplying water and ozone to the injector, an inner cylindrical wall extending upwardly from the bottom and spaced from and adjacent to the sidewall of the tank, and forming with the outer side-wall an annular mixing chamber between said inner and outer walls and forming a storage reservoir for the treated water centrally in the tank, said annular chamber being substantially unobstructed and narrow so the mixed ozone and water will swirl completely around and upwardly between the bottom of the tank and the top of said annular chamber, a conduit between the outlet of the injector and the outer side-wall of and adjacent the bottom of the tank arranged to deliver mixed water and ozone tangentially of and into the lower portion of the unobstructed annular chamber and force the mixed water and ozone to swirl around and upwardly from the bottom to the top of the annular chamber, and means for conducting water from the top of the annular chamber into the reservoir.

2. In apparatus for treating water with ozone, the combination of a tank comprising a cylindricalouter side-wall, a bottom and a top, an

injector outside of the tank, means for supplying water and ozone to the injector, an inner cylindrical wall extending upwardly from the bottom and spaced from and adjacent to the sidewall of the tank, and forming with the outer side-wall an annular mixing chamber between said inner and outer walls and forming a central storage reservoir for the treated water centrally in the tank, said annular chamber being substantially unobstructed and narrow so the mixed ozone and water will swirl completely around and upwardly between the bottom of the tank and the top of said annular chamber, and a conduit between the outlet of the injector and the outer side-wall of and adjacent the bottom of the tank arranged to deliver mixed water and ozone tangentially of and into the lower portion of the unobstructed annular chamber and force the mixed water and ozone to swirl around and upwardly from the bottom to the top of the annular chamber, the inner cylindrical wall terminating below the top of the tank so the treated water will overflow inwardly from the annular chamber into the reservoir.

ALAN B. CONANT. 

